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Ghosh Dastidar R, Banerjee S, Lal PB, Ghosh Dastidar S. Multifaceted Roles of AFG3L2, a Mitochondrial ATPase in Relation to Neurological Disorders. Mol Neurobiol 2024; 61:3788-3808. [PMID: 38012514 DOI: 10.1007/s12035-023-03768-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 11/01/2023] [Indexed: 11/29/2023]
Abstract
AFG3L2 is a zinc metalloprotease and an ATPase localized in an inner mitochondrial membrane involved in mitochondrial quality control of several nuclear- and mitochondrial-encoded proteins. Mutations in AFG3L2 lead to diseases like slow progressive ataxia, which is a neurological disorder. This review delineates the cellular functions of AFG3L2 and its dysfunction that leads to major clinical outcomes, which include spinocerebellar ataxia type 28, spastic ataxia type 5, and optic atrophy type 12. It summarizes all relevant AFG3L2 mutations associated with the clinical outcomes to understand the detailed mechanisms attributable to its structure-related multifaceted roles in proteostasis and quality control. We face early diagnostic challenges of ataxia and optic neuropathy due to asymptomatic parents and variable clinical manifestations due to heterozygosity/homozygosity of AFG3L2 mutations. This review intends to promote AFG3L2 as a putative prognostic or diagnostic marker.
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Affiliation(s)
- Ranita Ghosh Dastidar
- Department of Biochemistry, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Madhava Nagar, Manipal, 576104, Karnataka, India.
| | - Saradindu Banerjee
- Centre for Molecular Neurosciences, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Madhava Nagar, Manipal, 576104, Karnataka, India
| | - Piyush Behari Lal
- Department of Microbiology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Madhava Nagar, Manipal, 576104, Karnataka, India.
| | - Somasish Ghosh Dastidar
- Centre for Molecular Neurosciences, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Madhava Nagar, Manipal, 576104, Karnataka, India.
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Zhang G, Xie XX, Zhang SE, Zhang FL, Li CX, Qiao T, Dyce PW, Feng XL, Lin WB, Sun QC, Shen W, Cheng SF. Induced differentiation of primordial germ cell like cells from SOX9 + porcine skin derived stem cells. Theriogenology 2023; 212:129-139. [PMID: 37717516 DOI: 10.1016/j.theriogenology.2023.08.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 08/29/2023] [Accepted: 08/29/2023] [Indexed: 09/19/2023]
Abstract
Understanding the mechanisms behind porcine primordial germ cell like cells (pPGCLCs) development, differentiation, and gametogenesis is crucial in the treatment of infertility. In this study, SOX9+ skin derived stem cells (SOX9+ SDSCs) were isolated from fetal porcine skin and a high-purity SOX9+ SDSCs population was obtained. The SOX9+ SDSCs were induced to transdifferentiate into PGCLCs during 8 days of cultured. The results of RNA-seq, western blot and immunofluorescence staining verified SDSCs have the potential to transdifferentiate into PGCLCs from aspects of transcription factor activation, germ layer differentiation, energy metabolism, and epigenetic changes. Both adherent and suspended cells were collected. The adherent cells were found to be very similar to early porcine primordial germ cells (pPGCs). The suspended cells resembled late stage pPGCs and had a potential to enter meiotic process. This SDSCs culture-induced in vitro model is expected to provide suitable donor cells for stem cell transplantation in the future.
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Affiliation(s)
- Geng Zhang
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xin-Xiang Xie
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shu-Er Zhang
- Animal Husbandry General Station of Shandong Province, Jinan, 250010, China
| | - Fa-Li Zhang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian, 271018, China
| | - Chun-Xiao Li
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Tian Qiao
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Paul W Dyce
- Department of Animal Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Xin-Lei Feng
- Shandong Animal Products Quality and Safety Center, Jinan, 250010, China
| | - Wei-Bo Lin
- Animal Husbandry Development Center of Changyi City, Weifang, 261300, China
| | - Qi-Cheng Sun
- School of Finance, Southwestern University of Finance and Economics, Chengdu, 611130, China
| | - Wei Shen
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China.
| | - Shun-Feng Cheng
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China.
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Breast Cancer Prognosis Prediction and Immune Pathway Molecular Analysis Based on Mitochondria-Related Genes. Genet Res (Camb) 2022; 2022:2249909. [PMID: 35707265 PMCID: PMC9174003 DOI: 10.1155/2022/2249909] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 05/18/2022] [Indexed: 11/30/2022] Open
Abstract
Background Mitochondria play an important role in breast cancer (BRCA). We aimed to build a prognostic model based on mitochondria-related genes. Method Univariate Cox regression analysis, random forest, and the LASSO method were performed in sequence on pretreated TCGA BRCA datasets to screen out genes from a Gene Set Enrichment Analysis, Gene Ontology: biological process gene set to build a prognosis risk score model. Survival analyses and ROC curves were performed to verify the model by using the GSE103091 dataset. The BRCA datasets were equally divided into high- and low-risk score groups. Comparisons between clinical features and immune infiltration related to different risk scores and gene mutation analysis and drug sensitivity prediction were performed for different groups. Result Four genes, MRPL36, FEZ1, BMF, and AFG1L, were screened to construct our risk score model in which the higher the risk score, the poorer the prognosis. Univariate and multivariate analyses showed that the risk score was significantly associated with age, M stage, and N stage. The gene mutation probability in the high-risk score group was significantly higher than that in the low-risk score group. Patients with higher risk scores were more likely to die. Drug sensitivity prediction in different groups indicated that PF-562271 and AS601245 might be new inhibitors of BRCA. Conclusion We developed a new workable risk score model based on mitochondria-related genes for BRCA prognosis and identified new targets and drugs for BRCA research.
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At the Crossroads of Life and Death: The Proteins That Influence Cell Fate Decisions. Cancers (Basel) 2022; 14:cancers14112745. [PMID: 35681725 PMCID: PMC9179324 DOI: 10.3390/cancers14112745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 05/30/2022] [Accepted: 05/30/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Cellular senescence and apoptosis were historically thought of as two distinct cell fate pathways. However, many of the proteins involved are integral to both pathways. In particular, the ability of p53 to regulate both senescence and apoptosis meant it was seen as the decisive factor in these decisions, yet questions remain about its ability to select on its own the most appropriate cell fate according to each situation. Therefore, cell fates are no longer considered fixed endpoints but dynamic states that can be shifted given the right combination of activation and/or inhibitions of cofactors. Abstract When a cell is damaged, it must decide how to respond. As a consequence of a variety of stresses, cells can induce well-regulated programmes such as senescence, a persistent proliferative arrest that limits their replication. Alternatively, regulated programmed cell death can be induced to remove the irreversibly damaged cells in a controlled manner. These programmes are mainly triggered and controlled by the tumour suppressor protein p53 and its complex network of effectors, but how it decides between these wildly different responses is not fully understood. This review focuses on the key proteins involved both in the regulation and induction of apoptosis and senescence to examine the key events that determine cell fate following damage. Furthermore, we examine how the regulation and activity of these proteins are altered during the progression of many chronic diseases, including cancer.
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Dehghani N, Guven G, Kun-Rodrigues C, Gouveia C, Foster K, Hanagasi H, Lohmann E, Samanci B, Gurvit H, Bilgic B, Bras J, Guerreiro R. A comprehensive analysis of copy number variation in a Turkish dementia cohort. Hum Genomics 2021; 15:48. [PMID: 34321086 PMCID: PMC8317312 DOI: 10.1186/s40246-021-00346-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 07/09/2021] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Copy number variants (CNVs) include deletions or multiplications spanning genomic regions. These regions vary in size and may span genes known to play a role in human diseases. As examples, duplications and triplications of SNCA have been shown to cause forms of Parkinson's disease, while duplications of APP cause early onset Alzheimer's disease (AD). RESULTS Here, we performed a systematic analysis of CNVs in a Turkish dementia cohort in order to further characterize the genetic causes of dementia in this population. One hundred twenty-four Turkish individuals, either at risk of dementia due to family history, diagnosed with mild cognitive impairment, AD, or frontotemporal dementia, were whole-genome genotyped and CNVs were detected. We integrated family analysis with a comprehensive assessment of potentially disease-associated CNVs in this Turkish dementia cohort. We also utilized both dementia and non-dementia individuals from the UK Biobank in order to further elucidate the potential role of the identified CNVs in neurodegenerative diseases. We report CNVs overlapping the previously implicated genes ZNF804A, SNORA70B, USP34, XPO1, and a locus on chromosome 9 which includes a cluster of olfactory receptors and ABCA1. Additionally, we also describe novel CNVs potentially associated with dementia, overlapping the genes AFG1L, SNX3, VWDE, and BC039545. CONCLUSIONS Genotyping data from understudied populations can be utilized to identify copy number variation which may contribute to dementia.
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Affiliation(s)
- Nadia Dehghani
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA
| | - Gamze Guven
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Celia Kun-Rodrigues
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA
| | - Catarina Gouveia
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA
| | - Kalina Foster
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA
- Neuroscience Department, Michigan State University College of Natural Science, East Lansing, MI, USA
| | - Hasmet Hanagasi
- Behavioural Neurology and Movement Disorders Unit, Department of Neurology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Ebba Lohmann
- Department of Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- DZNE, German Center for Neurodegenerative Diseases, Tübingen, Germany
| | - Bedia Samanci
- Behavioural Neurology and Movement Disorders Unit, Department of Neurology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Hakan Gurvit
- Behavioural Neurology and Movement Disorders Unit, Department of Neurology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Basar Bilgic
- Behavioural Neurology and Movement Disorders Unit, Department of Neurology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Jose Bras
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA
- Division of Psychiatry and Behavioral Medicine, Michigan State University College of Human Medicine, Grand Rapids, MI, USA
| | - Rita Guerreiro
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA.
- Division of Psychiatry and Behavioral Medicine, Michigan State University College of Human Medicine, Grand Rapids, MI, USA.
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Burska D, Stiburek L, Krizova J, Vanisova M, Martinek V, Sladkova J, Zamecnik J, Honzik T, Zeman J, Hansikova H, Tesarova M. Homozygous missense mutation in UQCRC2 associated with severe encephalomyopathy, mitochondrial complex III assembly defect and activation of mitochondrial protein quality control. Biochim Biophys Acta Mol Basis Dis 2021; 1867:166147. [PMID: 33865955 DOI: 10.1016/j.bbadis.2021.166147] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/31/2021] [Accepted: 04/12/2021] [Indexed: 01/02/2023]
Abstract
The mitochondrial respiratory chain (MRC) complex III (CIII) associates with complexes I and IV (CI and CIV) into supercomplexes. We identified a novel homozygous missense mutation (c.665G>C; p.Gly222Ala) in UQCRC2 coding for structural subunit Core 2 in a patient with severe encephalomyopathy. The structural data suggest that the Gly222Ala exchange might result in an altered spatial arrangement in part of the UQCRC2 subunit, which could impact specific protein-protein interactions. Accordingly, we have found decreased levels of CIII and accumulation of CIII-specific subassemblies comprising MT-CYB, UQCRB, UQCRQ, UQCR10 and CYC1 subunits, but devoid of UQCRC1, UQCRC2, and UQCRFS1 in the patient's fibroblasts. The lack of UQCRC1 subunit-containing subassemblies could result from an impaired interaction with mutant UQCRC2Gly222Ala and subsequent degradation of both subunits by mitochondrial proteases. Indeed, we show an elevated amount of matrix CLPP protease, suggesting the activation of the mitochondrial protein quality control machinery in UQCRC2Gly222Ala fibroblasts. In line with growing evidence, we observed a rate-limiting character of CIII availability for the supercomplex formation, accompanied by a diminished amount of CI. Furthermore, we found impaired electron flux between CI and CIII in skeletal muscle and fibroblasts of the UQCRC2Gly222Ala patient. The ectopic expression of wild-type UQCRC2 in patient cells rescued maximal respiration rate, demonstrating the deleterious effect of the mutation on MRC. Our study expands the phenotypic spectrum of human disease caused by CIII Core protein deficiency, provides insight into the assembly pathway of human CIII, and supports the requirement of assembled CIII for a proper accumulation of CI.
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Affiliation(s)
- Daniela Burska
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic
| | - Lukas Stiburek
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic
| | - Jana Krizova
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic
| | - Marie Vanisova
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic
| | - Vaclav Martinek
- Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jana Sladkova
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic
| | - Josef Zamecnik
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University, Motol University Hospital, Prague, Czech Republic
| | - Tomas Honzik
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic
| | - Jiri Zeman
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic
| | - Hana Hansikova
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic
| | - Marketa Tesarova
- Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University, General University Hospital, Prague, Czech Republic.
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Pyrih J, Rašková V, Škodová-Sveráková I, Pánek T, Lukeš J. ZapE/Afg1 interacts with Oxa1 and its depletion causes a multifaceted phenotype. PLoS One 2020; 15:e0234918. [PMID: 32579605 PMCID: PMC7314023 DOI: 10.1371/journal.pone.0234918] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 06/04/2020] [Indexed: 11/19/2022] Open
Abstract
ZapE/Afg1 is a component of the inner cell membrane of some eubacteria and the inner mitochondrial membrane of eukaryotes. This protein is involved in FtsZ-dependent division of eubacteria. In the yeast and human mitochondrion, ZapE/Afg1 likely interacts with Oxa1 and facilitates the degradation of mitochondrion-encoded subunits of respiratory complexes. Furthermore, the depletion of ZapE increases resistance to apoptosis, decreases oxidative stress tolerance, and impacts mitochondrial protein homeostasis. It remains unclear whether ZapE is a multifunctional protein, or whether some of the described effects are just secondary phenotypes. Here, we have analyzed the functions of ZapE in Trypanosoma brucei, a parasitic protist, and an important model organism. Using a newly developed proximity-dependent biotinylation approach (BioID2), we have identified the inner mitochondrial membrane insertase Oxa1 among three putative interacting partners of ZapE, which is present in two paralogs. RNAi-mediated depletion of both ZapE paralogs likely affected the function of respiratory complexes I and IV. Consistently, we show that the distribution of mitochondrial ZapE is restricted only to organisms with Oxa1, respiratory complexes, and a mitochondrial genome. We propose that the evolutionarily conserved interaction of ZapE with Oxa1, which is required for proper insertion of many inner mitochondrial membrane proteins, is behind the multifaceted phenotype caused by the ablation of ZapE.
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Affiliation(s)
- Jan Pyrih
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice (Budweis), Czech Republic
- * E-mail: (JL); (JP)
| | - Vendula Rašková
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice (Budweis), Czech Republic
- Faculty of Science, University of South Bohemia, České Budějovice (Budweis), Czech Republic
| | - Ingrid Škodová-Sveráková
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice (Budweis), Czech Republic
- Faculty of Sciences, Comenius University, Bratislava, Slovakia
| | - Tomáš Pánek
- Faculty of Sciences, University of Ostrava, Ostrava, Czech Republic
| | - Julius Lukeš
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice (Budweis), Czech Republic
- Faculty of Science, University of South Bohemia, České Budějovice (Budweis), Czech Republic
- * E-mail: (JL); (JP)
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Crookenden MA, Moyes KM, Kuhn-Sherlock B, Lehnert K, Walker CG, Loor JJ, Mitchell MD, Murray A, Dukkipati VSR, Vailati-Riboni M, Heiser A, Roche JR. Transcriptomic analysis of circulating neutrophils in metabolically stressed peripartal grazing dairy cows. J Dairy Sci 2019; 102:7408-7420. [PMID: 31178180 DOI: 10.3168/jds.2019-16367] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/19/2019] [Indexed: 12/19/2022]
Abstract
The high metabolic demand during the transition into lactation places cows at greater risk of metabolic and infectious disease than at any other time in their lactation cycle. Additionally, a change occurs in the innate immune response during this period, which contributes to increased risk of disease. In the current study, we compared the transcriptomes of neutrophils from dairy cows divergent in their metabolic health post-calving. Cows (n = 5 per risk group) were selected from a parent experiment (n = 45 cows). Those with high or low concentrations of plasma nonesterified fatty acids, plasma β-hydroxybutyrate, and liver triacylglycerol in both wk 1 and 2 were deemed to be at "high risk" (HR) or "low risk" (LR) of metabolic dysfunction, respectively. Circulating neutrophils were isolated at 3 time points during the transition period (d 0 and wk 1 and 4 post-calving), and gene expression was analyzed using RNA sequencing. Differential gene expression between the risk groups was determined using edgeR (http://bioconductor.org), and pathway analysis was conducted using Ingenuity Pathway Analysis (Ingenuity Systems, Qiagen, Valencia, CA). Statistical analysis indicated no interaction between risk and week. Therefore, the overall effect of risk was analyzed across all time points. In total, 3,500 genes were differentially expressed between the HR and LR cows (false discovery rate < 0.05). Of these, 2,897 genes were identified by Ingenuity Pathway Analysis and used for pathway analysis. Of the relevant pathways identified, neutrophils isolated from HR cows showed downregulation of genes involved in the recruitment of granulocytes, interferon signaling, and apoptosis, and upregulation of genes involved in cell survival. The results indicate that metabolically stressed cows had reduced neutrophil function during the peripartum period, highlighting a potential relationship between subclinical metabolic disease and innate immune function that suggests that metabolic health negatively affects the innate immune system and may contribute to the state of immunosuppression during the peripartum period. In this way, the metabolic stress among the HR cows may reduce their ability to combat infection during the transition period.
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Affiliation(s)
- M A Crookenden
- DairyNZ Ltd., Hamilton, New Zealand 3284; School of Biological Sciences, University of Auckland, New Zealand 1010.
| | - K M Moyes
- Department of Animal and Avian Sciences, University of Maryland, College Park 20742
| | | | - K Lehnert
- School of Biological Sciences, University of Auckland, New Zealand 1010
| | - C G Walker
- DairyNZ Ltd., Hamilton, New Zealand 3284
| | - J J Loor
- Department of Animal Sciences, University of Illinois, Urbana 61801
| | - M D Mitchell
- University of Queensland, Centre for Clinical Research, Herston, Australia 4029
| | - A Murray
- Institute of Veterinary, Animal, and Biomedical Sciences, Massey University, Palmerston North, New Zealand 4442
| | - V S R Dukkipati
- Institute of Veterinary, Animal, and Biomedical Sciences, Massey University, Palmerston North, New Zealand 4442
| | - M Vailati-Riboni
- Department of Animal Sciences, University of Illinois, Urbana 61801
| | - A Heiser
- Institute of Veterinary, Animal, and Biomedical Sciences, Massey University, Palmerston North, New Zealand 4442; AgResearch, Hopkirk Research Institute, Palmerston North, New Zealand 4442
| | - J R Roche
- DairyNZ Ltd., Hamilton, New Zealand 3284; School of Biological Sciences, University of Auckland, New Zealand 1010
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Ward LSC, Sheriff L, Marshall JL, Manning JE, Brill A, Nash GB, McGettrick HM. Podoplanin regulates the migration of mesenchymal stromal cells and their interaction with platelets. J Cell Sci 2019; 132:jcs.222067. [PMID: 30745334 PMCID: PMC6432720 DOI: 10.1242/jcs.222067] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 01/24/2019] [Indexed: 12/18/2022] Open
Abstract
Mesenchymal stromal cells (MSCs) upregulate podoplanin at sites of infection, chronic inflammation and cancer. Here, we investigated the functional consequences of podoplanin expression on the migratory potential of MSCs and their interactions with circulating platelets. Expression of podoplanin significantly enhanced the migration of MSCs compared to MSCs lacking podoplanin. Rac-1 inhibition altered the membrane localisation of podoplanin and in turn significantly reduced MSC migration. Blocking Rac-1 activity had no effect on the migration of MSCs lacking podoplanin, indicating that it was responsible for regulation of migration through podoplanin. When podoplanin-expressing MSCs were seeded on the basal surface of a porous filter, they were able to capture platelets perfused over the uncoated apical surface and induce platelet aggregation. Similar microthrombi were observed when endothelial cells (ECs) were co-cultured on the apical surface. Confocal imaging shows podoplanin-expressing MSCs extending processes into the EC layer, and these processes could interact with circulating platelets. In both models, platelet aggregation induced by podoplanin-expressing MSCs was inhibited by treatment with recombinant soluble C-type lectin-like receptor 2 (CLEC-2; encoded by the gene Clec1b). Thus, podoplanin may enhance the migratory capacity of tissue-resident MSCs and enable novel interactions with cells expressing CLEC-2. Summary: Podoplanin enhances the migration of mesenchymal stromal cells in a Rac-1-dependent manner, enabling direct interactions of subendothelial stroma with circulating platelets.
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Affiliation(s)
- Lewis S C Ward
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK
| | - Lozan Sheriff
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Jennifer L Marshall
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK
| | - Julia E Manning
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK
| | - Alexander Brill
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK.,Centre of Membrane and Protein and Receptors (COMPARE), Institute for Biomedical Research, The Medical School, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.,Department of Pathophysiology, Sechenov First Moscow State Medical University, Moscow 119048, Russia
| | - Gerard B Nash
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Helen M McGettrick
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK
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10
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Loss of Mitochondrial AAA Proteases AFG3L2 and YME1L Impairs Mitochondrial Structure and Respiratory Chain Biogenesis. Int J Mol Sci 2018; 19:ijms19123930. [PMID: 30544562 PMCID: PMC6321463 DOI: 10.3390/ijms19123930] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/28/2018] [Accepted: 12/04/2018] [Indexed: 12/16/2022] Open
Abstract
Mitochondrial protein quality control is crucial for the maintenance of correct mitochondrial homeostasis. It is ensured by several specific mitochondrial proteases located across the various mitochondrial subcompartments. Here, we focused on characterization of functional overlap and cooperativity of proteolytic subunits AFG3L2 (AFG3 Like Matrix AAA Peptidase Subunit 2) and YME1L (YME1 like ATPase) of mitochondrial inner membrane AAA (ATPases Associated with diverse cellular Activities) complexes in the maintenance of mitochondrial structure and respiratory chain integrity. We demonstrate that loss of AFG3L2 and YME1L, both alone and in combination, results in diminished cell proliferation, fragmentation of mitochondrial reticulum, altered cristae morphogenesis, and defective respiratory chain biogenesis. The double AFG3L2/YME1L knockdown cells showed marked upregulation of OPA1 protein forms, with the most prominent increase in short OPA1 (optic atrophy 1). Loss of either protease led to marked elevation in OMA1 (OMA1 zinc metallopeptidase) (60 kDa) and severe reduction in the SPG7 (paraplegin) subunit of the m-AAA complex. Loss of the YME1L subunit led to an increased Drp1 level in mitochondrial fractions. While loss of YME1L impaired biogenesis and function of complex I, knockdown of AFG3L2 mainly affected the assembly and function of complex IV. Our results suggest cooperative and partly redundant functions of AFG3L2 and YME1L in the maintenance of mitochondrial structure and respiratory chain biogenesis and stress the importance of correct proteostasis for mitochondrial integrity.
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Germany EM, Zahayko N, Huebsch ML, Fox JL, Prahlad V, Khalimonchuk O. The AAA ATPase Afg1 preserves mitochondrial fidelity and cellular health by maintaining mitochondrial matrix proteostasis. J Cell Sci 2018; 131:jcs.219956. [PMID: 30301782 DOI: 10.1242/jcs.219956] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 10/01/2018] [Indexed: 11/20/2022] Open
Abstract
Mitochondrial functions are critical for cellular physiology; therefore, several conserved mechanisms are in place to maintain the functional integrity of mitochondria. However, many of the molecular details and components involved in ensuring mitochondrial fidelity remain obscure. Here, we identify a novel role for the conserved mitochondrial AAA ATPase Afg1 in mediating mitochondrial protein homeostasis during aging and in response to various cellular challenges. Saccharomyces cerevisiae cells lacking functional Afg1 are hypersensitive to oxidative insults, unable to tolerate protein misfolding in the matrix compartment and exhibit progressive mitochondrial failure as they age. Loss of the Afg1 ortholog LACE-1 in Caenorhabditis elegans is associated with reduced lifespan, impeded oxidative stress tolerance, impaired mitochondrial proteostasis in the motor neuron circuitry and altered behavioral plasticity. Our results indicate that Afg1 is a novel protein quality control factor, which plays an important evolutionarily conserved role in mitochondrial surveillance, and cellular and organismal health.
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Affiliation(s)
- Edward M Germany
- Department of Biochemistry, Nebraska Redox Biology Center, University of Nebraska, Lincoln, NE 68588, USA
| | - Nataliya Zahayko
- Department of Biochemistry, Nebraska Redox Biology Center, University of Nebraska, Lincoln, NE 68588, USA
| | - Mason L Huebsch
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC 29424, USA
| | - Jennifer L Fox
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC 29424, USA
| | - Veena Prahlad
- Department of Biology, Aging Mind and Brain Initiative, University of Iowa, Iowa City, IA 52242, USA
| | - Oleh Khalimonchuk
- Department of Biochemistry, Nebraska Redox Biology Center, University of Nebraska, Lincoln, NE 68588, USA .,Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
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Chen J, Wang A, Chen Q. SirT3 and p53 Deacetylation in Aging and Cancer. J Cell Physiol 2017; 232:2308-2311. [PMID: 27791271 DOI: 10.1002/jcp.25669] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 10/27/2016] [Indexed: 12/23/2022]
Affiliation(s)
- Jijun Chen
- Research and Development; Allonger LLC, Columbia Maryland
- Mei Chen Biotechnology Co. Ltd.; Qingdao, Shan Dong China
| | - Aiqin Wang
- The Affiliated Hospital of Qingdao University; Qingdao, Shan Dong China
| | - Qingqi Chen
- The Affiliated Hospital of Qingdao University; Qingdao, Shan Dong China
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